Add 2.2 blog post (#9589)
* Generate draft via script
* Add description
* Mention about pre-commit
* Remove pr-9209.md
* Mention about pre-commit
* Add pr-8937.md
* Update pr-9473
* Update pr-9473
* Update intro file
* Add links to TS 4.1
* Update blog-post
* Move pre-commit support to pre-commit repo
* Fix BLOG_POST_INTRO_TEMPLATE.md
* re-generate draft
* Fix switching versions and re-generate draft
* Update links for TS 4.1
* Update draft
Co-authored-by: fisker Cheung <lionkay@gmail.com>
